Touch input device and method for portable device

ABSTRACT

A touch input device and method for a portable device that is capable of inputting various user commands with diversified touch events detected on a touch screen is provided. A touch input method for a mobile terminal having a touch screen may include displaying a plurality of representative images representing content objects on the touch screen, selecting at least one representative image in response to a first command designated for a first touch event on the touch screen, and executing a second command designated for a second touch event on the touch screen. The second touch event may be defined by a movement direction, speed, a lift position of a touch, and the representative images selected by the first command.

CROSS REFERENCE TO RELATED APPLICATION

This application claims priority from and the benefit of Korean PatentApplication No. 2008-0097300, filed on Oct. 2, 2008, which is herebyincorporated by reference for all purposes as if fully set forth herein.

BACKGROUND OF THE INVENTION

1. Field of the Invention

Exemplary embodiments of the present invention relate to a portabledevice. In particular, exemplary embodiments of the present inventionrelate to a touch input device and method for a portable device that iscapable of inputting various user commands with diversified touch eventson a touch screen.

2. Description of the Background

Recently, portable devices have become very popular and are widely usedfor various purposes due to, for example, their compact designs forportability and useful applications. Particularly, the mobile phone(hereinafter, the term “mobile terminal” is interchangeably used with“mobile phone”) is becoming one of the most versatile devices withdiverse supplementary services, in addition to basic voice communicationfunctionality.

Initially, a mobile terminal was manufactured with large batteries andinternal components to secure system stability. However, due to largecomponent size, the mobile terminals were also quite large, therebylimiting their mobility. With advancements in device integration andbattery technologies, however, mobile terminals can now be manufacturedin slim and compact designs.

Despite having slim and compact designs, a mobile terminal's displaydevice must have a size capable of supporting diverse applications andservices. Particularly when using an Internet access service, a mobileterminal having a small display screen may provide limited usersatisfaction. More recently, touch screens are being used in place ofconventional keypads in order to secure a display space as large aspossible in the mobile terminal.

However, the current touch screen-equipped mobile terminal having nokeypad or a down-sized keypad may be limited to generating input signalsonly through a touch on the touch screen.

SUMMARY OF THE INVENTION

Exemplary embodiments of the present invention provide a touch inputdevice and method for a mobile terminal having a touch screen capable ofreceiving various user commands with diversified touch events.

Additional features of the invention will be set forth in thedescription which follows, and in part will be apparent from thedescription, or may be learned by practice of the invention.

Exemplary embodiments of the present invention disclose a touch inputmethod for a mobile terminal having a touch screen. The method includesdisplaying, on the touch screen, a plurality of representative imagescorresponding to content objects. The method further includes selecting,from the plurality of representative images, at least one representativeimage in response to a first command corresponding to a first touchevent detected on the touch screen. The method further includesexecuting a second command corresponding to a second touch eventdetected on the touch screen. The second touch event is defined by amovement direction, speed, and a lift position of a touch associatedwith the first touch event and the second touch event, and the at leastone representative image selected by the first command.

Exemplary embodiments of the present invention also disclose a touchinput method for a mobile terminal having a touch screen. The methodincludes collecting data of contact points on a line that a first touchevent draws on the touch screen without lift; determining, based on thedata of the contact points, whether a closed loop is detected; andselecting, when a closed loop is detected, at least one of a set of therepresentative images located inside of the closed loop, a set of therepresentative images located across the line of the closed loop, and agroup of the representative images each of which a portion placed insideof the closed loop is greater than a predetermined percentage.

Exemplary embodiments of the present invention disclose a touch inputdevice for a mobile terminal. The device includes a display unit and acontrol unit. The display unit displays a plurality of representativeimages. Each representative image corresponds to a contents object. Thedisplay unit comprises a touch screen to detect touch events including atouch-down event to select a representative image and a drag event tomove the selected representative image. The control unit executes a usercommand corresponding to a touch event detected on the touch screen. Theexecution is based on a movement direction, speed, and a final contactpoint, and a content object type corresponding to the selectedrepresentative image.

It is to be understood that both the foregoing general description andthe following detailed description are exemplary and explanatory and areintended to provide further explanation of the invention as claimed.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are included to provide a furtherunderstanding of the invention and are incorporated in and constitute apart of this specification, illustrate exemplary embodiments of theinvention, and together with the description serve to explain theprinciples of the invention.

FIG. 1 is a block diagram illustrating a configuration of a touchscreen-enabled mobile terminal according to exemplary embodiments of thepresent invention.

FIG. 2 is a block diagram illustrating a configuration of the controlunit in FIG. 1 according to exemplary embodiments of the presentinvention.

FIG. 3A is a diagram illustrating a step of displaying a media boardapplication screen for a touch input method in a mobile terminalaccording to exemplary embodiments of the present invention.

FIG. 3B is a diagram illustrating a step of processing a touch-downevent for a touch input method in a mobile terminal according toexemplary embodiments of the present invention.

FIG. 3C is a diagram illustrating a step of processing a drag event fora touch input method in a mobile terminal according to exemplaryembodiments of the present invention.

FIG. 3D is a diagram illustrating a step of displaying command tipsdesignated for direction-specific drag events for a touch input methodin a mobile terminal according to exemplary embodiments of the presentinvention.

FIG. 4A is a diagram illustrating a step of displaying a media boardapplication screen for a touch input method in a mobile terminalaccording to exemplary embodiments of the present invention.

FIG. 4B is a diagram illustrating a step of processing a closed loopdrag event for a touch input method in a mobile terminal accordingexemplary embodiments of the present invention.

FIG. 4C is a diagram illustrating a step of highlighting selectedrepresentative images for a touch input method in a mobile terminalaccording to exemplary embodiments of the present invention.

FIG. 4D is a diagram illustrating a step of executing a commanddesignated for a closed loop drawing event for a touch input method in amobile terminal according to exemplary embodiments of the presentinvention.

FIG. 4E is a diagram illustrating a step of displaying command tipsdesignated for available direction-specific drag events following aclosed loop drawing event for a touch input method in a mobile terminalaccording to exemplary embodiments of the present invention.

FIG. 5 is a flowchart illustrating a touch input method in a mobileterminal according to exemplary embodiments of the present invention.

FIG. 6 is a flowchart illustrating a touch input method in a mobileterminal according to exemplary embodiments of the present invention.

DETAILED DESCRIPTION OF ILLUSTRATED EMBODIMENTS

Exemplary embodiments of the present invention are described withreference to the accompanying drawings in detail. The same referencenumbers are used throughout the drawings to refer to the same or likeparts. Detailed descriptions of well-known functions and structuresincorporated herein may be omitted to avoid obscuring the subject matterof the present invention. This invention may, however, be embodied inmany different forms and should not be construed as limited to theexemplary embodiments set forth herein. Rather, these exemplaryembodiments are provided so that this disclosure is thorough, and willfully convey the scope of the invention to those skilled in the art. Inthe drawings, the size and relative sizes of layers and regions may beexaggerated for clarity.

Hereinafter, exemplary embodiments of the present invention aredescribed in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram illustrating a configuration of a touchscreen-enabled mobile terminal according to exemplary embodiments of thepresent invention.

Referring to FIG. 1, the mobile terminal 100 may include a RadioFrequency (RF) unit 110, an audio processing unit 120, a display unit130, a touch screen 140, a storage unit 150, and a control unit 160. TheRF unit 110 can be omitted if the mobile terminal 100 is a portabledevice with no radio communication function.

The mobile terminal 100 may allow the user to select an object stored inthe storage unit 150 by using the touch screen 140 provided on thedisplay unit 130. The mobile terminal 100 may then convert a touch eventprompted by the user into a corresponding input signal with reference toan event map stored in the storage unit 150. A touch event may bedetected on the touch screen 140 of the mobile terminal 100. The touchevent may be defined using three attributes, namely, speed, direction,and location. When these three attributes of a touch event satisfypredetermined values designated for a function, the mobile terminal 100may execute the function mapped to the touch event. The mobile terminal100 may allow the user to select multiple objects displayed on thedisplay unit 130. Furthermore, the mobile terminal 100 may play thecontents represented by the objects, or may convert the objects into newtypes of objects. The internal function blocks of the mobile terminal100 are described hereinafter in more detail.

The RF unit 110 may transmit and receive radio signals carrying data forvoice communication service, Short Message Service (SMS), MultimediaMessage Service (MMS), and the like. The RF unit 110 may superimpose theaudio/video and control data to be transmitted on a radio frequencysignal, and may extract the audio/video and control data from a receivedradio frequency signal. The RF unit 110 may include an RF transmitterfor up-converting and amplifying the signal frequency to be transmitted,and an RF receiver for low noise amplifying and down-converting thereceived radio signal. The RF unit 110 can transmit a specific contentplaying or stored in the mobile terminal 100 in the form of a radiosignal under control of the control unit 160, according to a specifictouch event detected on the touch screen 140.

The audio processing unit 120 may include a speaker (SPK) for outputtingaudio signals in the form of an audible sound wave, and a microphone(MIC) for receiving sound wave (e.g. user voice), in the form of anaudio signal. For example, when a plurality of content objects includingat least one audio content object having a sound source are generated orreceived, the audio processing unit 120 may output the sound sourcethrough the speaker (SPK) in the form of an audible sound wave under thecontrol of the control unit 160.

The display unit 130 may display various video data corresponding to thevideo contents stored in the storage unit 150, user input data, andvarious supplementary function screens. The display unit 130 can beimplemented with a Liquid Crystal Display (LCD). In some cases, the LCDmay be configured with a touch screen. Accordingly, the display unit 130can work as an input device. The display unit 130 can display a mediaboard screen for presenting multiple contents objects stored in thestorage unit 150. The media board screen can display icons representingvarious kinds of content objects stored in the storage unit 150. In somecases, the displayed content objects may be presented in an order. Inother cases, the displayed content objects may be presented out oforder. The touch screen 140 of the mobile terminal 100 may be configuredwith touch points according to an event map stored in storage unit 150.The event map may be used to select the icon representing a contentobject displayed on the touch screen 140. A user interface provided bythe display unit 130 is described hereinafter in detail with referenceto drawings.

The touch screen 140 may be provided by the display unit 130 to detect atouch event on the display unit 130, and may output a correspondingsignal to the control unit 160. The touch screen 140 can detect varioustouch events including a touch-down event when a finger or an objectcontacts the touch screen 140; a drag event occurred by dragging thecontact point of the finger or object on the touch screen 140 in apredetermined direction at a speed faster than a predetermined value;and a touch-lift event that occurs by lifting the finger or objectcontacting the touch screen 140. A closed loop drawing event may bedefined hereinafter. When a touch (or contact) is detected at a point onthe touch screen 140 and the touch moves (e.g., drag) on the touchscreen 140, the touch screen 140 may calculate the coordinates of thecontact points and may indicate that the touch is passing in real time.The touch screen 140 may then check whether a specific coordinate isdetected twice without occurrence of a touch-lift event. If a specificcoordinate is detected twice, a closed loop drawing event is determinedto have occurred. In this case, the touch screen 140 may transmit, tothe control unit 160, information on the area defined by the closed loopdrawing event. The control unit 160 may select the content objectsrepresented by the representative images (e.g. icons and/or thumbnailimages) located inside and/or on the boundary line of the closed loop,and may execute a command designated for the selected content objectsaccording to a preset user configuration.

The storage unit 150 may store an operating system of the mobileterminal 100 and application programs for executing supplementaryfunctions of the mobile terminal 100, such as, for example, fileplayback function, camera function, and broadcast playback function(when supported by the mobile terminal). The storage unit 150 may alsostore user data and application data generated or downloaded through anetwork while the application programs are running. The storage unit 150may further store at least one program and data memories. The storageunit 150 may store the event map for operating the touch screen 140, anda touch screen application program for defining the coordinates on thedisplay screen and for generating a signal corresponding to a touchevent that occurred on the display screen.

The program memory can be configured to store the operating system andthe touch screen application program. The program memory may also storeother application programs, such as, for example, a text messagingprogram for composing and transmitting a text message, a contenttransmission program, a short range communication management program(e.g. a Bluetooth application program), and a file management programthat may be executed interactively with the operation of the touchscreen application program. These application programs can be executedsimultaneously or independently in accordance with the touch eventdetected on the touch screen 140. For instance, when a touch event isdetected while the touch screen application is running, at least oneicon selected by the touch event may be highlighted to indicate that thecontent object represented by the icon is selected. If a specific touchevent is detected while the at least one icon is highlighted, the touchscreen application program may execute an application program (orfunction) mapped to the highlighted icon and corresponding touch eventby looking up the event map. The application program can be, forexample, a text messaging application program for composing andtransmitting a text message and/or a file management application fordeleting, copying, and pasting the selected content object.

The data memory may store application data generated while theapplication programs are running and/or user data input by the user. Theapplication and user data can include, but not be limited to, phonebookdata, video data captured with camera function, and text message datatransmitted and received by means of the RF unit 110. The data memorymay store various content objects and an event map. The content objectscan be reproduced as a set of aggregated content objects bysimultaneously selecting multiple content objects according to a presetconfiguration of the mobile terminal 100.

The control unit 160 may control the entire operation of the mobileterminal and signaling among the internal function blocks. The controlunit 160 may configure the coordinates on the touch screen 140 based onthe event map stored in the storage unit 150, and, when detecting atouch event, may generate an input signal with reference to the eventmap. The control unit 160 may include a touch event detector 161, atouch event calculator 163, and a touch event controller 165, as shownin FIG. 2.

FIG. 2 is a block diagram illustrating a configuration of the controlunit in FIG. 1 according to exemplary embodiments of the presentinvention.

The touch event detector 161 may detect a touch event that has occurredon the touch screen 140. If a touch event has been detected, the touchevent detector 161 may acquire the coordinates on the touch screen 140corresponding to the touch event. The touch event detector 161 may checkthe duration of the touch event (i.e., the duration of stationaryholding of the contact with the touch screen 140). If the contact pointmoves, the touch event detector 161 may detect the direction and speedof the movement. That is, the touch event detector may collect touchevent information including the initial contact point where thetouch-down occurs, and the movement direction and speed of the touchevent. The touch event information also includes the final contact pointat which the touch-lift occurs.

The touch event calculator 163 may determine which user command is inputby analyzing the touch event information output by the touch eventdetector 161. The touch event calculator 163 may load the touch eventmap from the storage unit 150, and may retrieve the input signal mappedto the touch event. For instance, when a touch-down event is detected atthe location where a specific icon is located on the touch screen 140,the touch event detector 161 may output touch event informationindicating the selection of the icon to the touch event calculator 163.Upon receipt of the touch event information, the touch event calculator163 may output an input signal indicating the selection of the icon tothe touch event controller 165. If the contact point is moving without alift, the touch event detector 161 may detect the movement of thecontact point and may output information on the movement direction andspeed to the touch event calculator 163. The touch event calculator 163may analyze the touch event information, output the input signalcorresponding to the touch event, and may transmit the input signal tothe touch event controller 165. The input signal may be associated withdeleting the selected content object, changing the name of the contentobject, transmitting a text message, or Bluetooth transmission.

The touch event controller 165 may highlight the icons selected on thetouch screen 140, and process the content objects represented by theselected icons according to the input signal.

For instance, when a touch-down event is detected at a position where aspecific icon is located on the touch screen 140, the touch eventcontroller 165 may highlight the icon. Sequentially, if the contactpoint moves in a specific direction (i.e., a drag event is detected),the touch event controller 165 may move the icon according to themovement direction of the contact point. If the movement direction andspeed of the contact point reaches a predetermined threshold value, orthe contact point is located at a specific position, the touch eventcontroller 165 may perform a function preset corresponding to themovement speed and direction or the location of the contact point. Forinstance, when the contact point placed on an icon moves upward across aboundary of the display zone of the touch screen 140 at a speed fasterthan a predetermined threshold value, the touch event controller 165 mayinterpret this touch event as a file name edit command, and may displaya popup window to allow the user to rename the content object. A singlecontent object handling operation of the mobile terminal 100 may bedescribed hereinafter in detail with reference to the accompanyingdrawings.

FIG. 3A, FIG. 3B, FIG. 3C, and FIG. 3D show exemplary screen imagesillustrating steps of a touch input method for a mobile terminalaccording to exemplary embodiments of the present invention.

FIG. 3A is a diagram illustrating a step of displaying a media boardapplication screen for a touch input method in a mobile terminalaccording to exemplary embodiments of the present invention.

Referring to FIG. 3A, if a media board application execution command isinput by the user selecting a “media board” menu item on a menu screen,the mobile terminal 100 may instruct the display unit 130 to display anapplication screen of the media board application. The media boardapplication screen may include a plurality of representative imagesrepresenting the content objects stored in the storage unit 150, asshown in FIG. 3A. The content objects can include, but are not limitedto, text content objects, video content objects, and audio contentobjects. The content object can be displayed on the media boardapplication window in the form of a representative image, such as anicon or a thumbnail image. For example, a video content object, such asa still picture, can be represented by a thumbnail image, and an audiocontent object can be represented by a predetermined icon. Therepresentative images can be arranged in a particular order or, as shownin FIG. 3A, out of order (e.g., randomly) on the media board applicationscreen. In some cases, the arrangement of the representative images canbe maintained when the media board application is terminated and thenexecuted again later.

FIG. 3B is a diagram illustrating a step of processing a touch-downevent for a touch input method in a mobile terminal according toexemplary embodiments of the present invention.

Referring to FIG. 3B, if a representative image is selected in the mediaboard application screen by a touch-down event on the touch screen 140,the control unit 160 may instruct the display unit 130 to highlight theselected representative image placed at the contact point. The touchevent detector 161 of the control unit 160 may detect the touch-downevent on the touch screen 140, and may identify the representative imagelocated at the contact point on which the touch-down event is detected.Since multiple representative images can be distributed out of order andmay overlap each other on the media board screen, the control unit 160may search for the representative image placed at the top of therepresentative images at the location where the touch-down event isdetected. For example, when multiple representative images are partiallyoverlapped at the location where the touch-down event has been detected,the control unit 160 may select the image placed on top of therepresentative images and may highlight the selected representativeimage. The control unit 160 may give selection priority tonon-overlapped parts of the overlapped representative images. If theselected representative image is partially hidden by anotherrepresentative image, the control unit 160 may retrieve the contentobject represented by the selected representative image from the storageunit 150, and may display the complete image of the selectedrepresentative image. If a user-desired representative image is locatedbelow another representative image at the location where the touch-downevent is detected, the representative image at the top of the overlappedrepresentative images may be selected and dragged in any direction usinga drag event. Subsequently, a user may select, as described above, therepresentative image of the user's choice, which may now lie on top ofrepresentative images at the location where the touch-down event wasdetected.

FIG. 3C is a diagram illustrating a step of processing a drag event fora touch input method in a mobile terminal according to exemplaryembodiments of the present invention.

Referring to FIG. 3C, if a drag event (i.e., movement of the contactpoint in a specific direction) is detected while the representativeimage is selected by the touch-down event, the control unit 160 mayinstruct the display unit 130 to show the drag movement of the selectedrepresentative image according to the movement of the contact point. Thecontrol unit 160 may then calculate the movement direction, speed, andfinal location of the drag event, and may load the event map.

The control unit 160 can designate specific commands for the drag eventsacross boundaries of the display zone of the touch screen 140. Forexample, referring to FIG. 3C and FIG. 3D, the control unit 160 maydesignate a file name change command (e.g., Rename) for a drag eventacross the top boundary of the display zone of the touch screen 140; aBluetooth transmission command for a drag event across the bottomboundary of the display zone of the touch screen 140; a delete commandfor a drag event across the left boundary of the display zone of thetouch screen 140; and a message transmission command for a drag eventacross the right boundary of the display zone of the touch screen 140.The command designation can be changed according to the mobile terminaldesigner's preference/selection or the user's preference/selection. Whenthe drag event occurs in a direction towards one of the four boundariesof the display zone of the touch screen 140 at a speed faster than apredetermined threshold speed, while a representative image is selectedby a touch-down event, the control unit 160 may execute the commanddesignated for the drag event. For instance, when a representative imageis selected by a touch-down event and then dragged by a drag event in anupward direction of the touch screen 140 across the boundary of thedisplay zone at a speed faster than the predetermined threshold value,the control unit 160 may determine an input of a file name changecommand and may display a popup window for the user to rename thecontent object represented by the representative image. If the mobileterminal 100 is not provided with a keypad, the control unit 160 mayinstruct the display unit 130 to display a popup window such that theuser may use a key map to enter alphanumeric data in a text box of thepopup window.

When a representative image is selected by a touch-down event anddragged by a drag event in a rightward direction of the touch screen 140across the boundary of the display zone, at a speed faster than thepredetermined threshold value, the control unit 160 may determine aninput of the message transmission command, and may activate a messagecomposition application. When the selected representative imagerepresents a text message object, the control unit 160 may execute atext message composition application, and may instruct the display unit130 to display a text message in the text message object. When theselected representative image represents an audio content object or avideo content object, the control unit 160 may execute a multimediamessage composition application, and instruct the display unit 130 todisplay the audio or video content object.

When a representative image is selected by a touch-down event and thendragged by a drag event towards a left direction of the touch screen 140across the boundary of the display zone, at a speed faster than thepredetermined threshold value, the control unit 160 may determine aninput of the delete command, and may delete the content objectrepresented by the representative image from the storage unit 150. Toprevent the content objects from being accidentally deleted, the controlunit 160 can instruct the display unit 130 to display, using a touchscreen 140, a popup window to obtain confirmation of the delete command.When the drag event occurs across one of the boundaries of the displayzone of the touch screen 140, command tips indicating the commands to beexecuted according to the drag events across the boundaries aredisplayed on the respective boundaries.

Although the commands are designated for the touch-down and drag eventsin the above description, exemplary embodiments of the present inventionare not limited thereto. For example, various other commands can bedesignated for drag events occurring on the touch screen in specificdirections at a speed faster than a predetermined threshold value.Furthermore, the commands designated for available drag events can beexecuted by touching the corresponding command tips (e.g., iconsdisplaying “Rename,” “Message Transmission,” “Bluetooth Transmission,”and “Delete” on the top, right, bottom, and left sides of the touchscreen 140).

A multiple content objects handling operation of the mobile terminal isdescribed hereinafter in detail with reference to accompanying drawings.

FIG. 4A, FIG. 4B, FIG. 4C, FIG. 4D, and FIG. 4E show exemplary screenimages illustrating steps of a touch input method for a mobile terminalaccording to exemplary embodiments of the present invention.

FIG. 4A is a diagram illustrating a step of displaying a media boardapplication screen for a touch input method in a mobile terminalaccording to exemplary embodiments of the present invention.

Referring to FIG. 4A, if a media board application execution command isinput by the user selecting a “media board” menu item on a menu screen,the mobile terminal 100 may instruct the display unit 130 to display anapplication screen of the media board application. The media boardapplication screen may include a plurality of representative imagesrepresenting the content objects stored in the storage unit 150. Thecontent objects may include, but not be limited to, text contentobjects, video content objects, and audio content objects. Therepresentative images may be displayed on the media board applicationscreen in some cases, in order, and in some cases, out of order (e.g.,randomly). The representative images may be selected, moved, andrearranged in the display zone of the touch screen 140 according to theuser's preference/selection.

FIG. 4B is a diagram illustrating a step of processing a closed loopdrag event for a touch input method in a mobile terminal accordingexemplary embodiments of the present invention.

Referring to FIG. 4B, when a touch event is detected in the media boardapplication screen and the touch is dragged to draw a closed loop on thetouch screen 140, the control unit 160 may determine that a closed loopdrawing event has occurred for selecting one or more content objects.When a touch event is detected on the touch screen 140, the control unit160 may determine whether there is a representative image at thelocation where the touch event is detected. If there is a representativeimage at the location where the touch event is detected, the controlunit 160 may determine the occurrence of a touch-down event forselecting a content object represented by the representative image, andmay highlight the representative image. Otherwise, if there is not arepresentative image at the point on which the touch is detected, thecontrol unit 160 may monitor movement of the touch (e.g., contact). Ifthe touch moves, the control unit 160 may determine coordinates of thecontact points contacted by the touch in real time, and may checkwhether a specific coordinate is detected twice without lift. If aspecific coordinate is detected twice without lift, the control unit 160determines occurrence of a closed loop drawing event, and may execute acommand designated for the closed loop drawing event. Once a closed loopdrawing event is detected, the control unit 160 may record coordinateson which the touch has passed, and may display the closed loop trace onthe touch screen 140, as shown in FIG. 4B, such that the user may verifythe area defined by the closed loop trace.

FIG. 4C is a diagram illustrating a step of highlighting selectedrepresentative images for a touch input method in a mobile terminalaccording to exemplary embodiments of the present invention.

Referring to FIG. 4C, once multiple representative images are selectedby a closed loop drawing event occurring on the touch screen 140, thecontrol unit 160 may highlight the selected representative images andmay execute a command designated for the closed loop drawing event. Thecontrol unit 160 may analyze the locations of the representative imagesdisplayed in the multimedia board application screen, and may retrievethe representative images placed inside of the area defined by theclosed loop. For example, the control unit 160 can determine theselected representative images depending on whether coordinates occupiedby the representative images overlap with the coordinates of the areadefined by the closed loop. The control unit 160 can select therepresentative images placed across the boundary line of the closed loopas well as representative images placed inside of the closed loop. Insome cases, the control unit 160 may only select the representativeimages placed inside the closed loop. In some cases, the control unit160 may also select the representative images placed across the boundaryline of the closed loop if the part placed inside the closed loop isgreater than a predetermined percentage of the representative imagearea. The criteria for selecting the representative images can beconfigured according to a user's preference/selection, or a designer'spreference/selection, and the mobile terminal 100 can be configured toprovide a menu option for configuring the representative image selectioncriteria.

FIG. 4D is a diagram illustrating a step of executing a commanddesignated for a closed loop drawing event for a touch input method in amobile terminal according to exemplary embodiments of the presentinvention.

Referring to FIG. 4D, after highlighting the representative imagesselected by the closed loop drawing event, the control unit 160 maycombine and reproduce the content objects represented by therepresentative images by replacing the combined content objects with newcontent objects and new representative images corresponding to thecombined content objects. For example, when multiple content objectsstored in the storage unit 150 are selected by the closed loop drawingevent on the touch screen 140, the selected content objects may bereproduced as a combined content object automatically. Accordingly, arepresentative image representing the combined content object may bedisplayed in the multimedia board application window. For instance, whenthe selected content objects include multiple still pictures and anaudio file, the control unit 160 may combine the still pictures and theaudio file into a “slide picture album” as a multimedia content objectwhich displays the still pictures in slide-show format while playing theaudio file as background music. The slide picture album can beconfigured to display the pictures in series at a predetermined displayinterval, along with the background music.

When the selected content objects include multiple motion and stillpictures and multiple music files, the control unit 160 may arrange themultiple motion pictures followed by the multiple still pictures inseries such that the motion and still pictures are played in sequentialorder while playing the audio files as background music in sequentialorder. In some cases, the multiple still pictures may be followed bymultiple motion pictures in series, with the audio files being played insequential order as background music.

This file management and control function can be executed by a commanddesignated for the closed loop drawing event in combination with a dragevent as described above.

FIG. 4E is a diagram illustrating a step of displaying command tipsdesignated for available direction-specific drag events following aclosed loop drawing event for a touch input method in a mobile terminalaccording to exemplary embodiments of the present invention.

When the multiple representative images are selected by the closed loopdrawing event as explained above, the control unit 160 may highlight theselected representative images as shown in FIG. 4C, and may displaycommand tips on the boundaries of the touch screen 140 to inform theuser of commands designated for available drag events following theclosed loop drawing event. As shown in FIG. 4E, command tips associatedwith a slide picture album command, a delete command, a messagetransmission command, and a Bluetooth transmission command designatedfor an upward drag event, a leftward drag event, a rightward drag event,and a bottomward drag event, respectively, are displayed on therespective top, left, right, and bottom boundaries of the touch screen140. The commands designated for the four direction drag events can bechanged according to the mobile terminal designer's selection/preferenceor the user-configured settings.

After selection of the multiple content objects by the closed loopdrawing event, the user can input a command with one of the drag eventswhile the command tips are displayed. For instance, if a drag eventoccurs after selection of the multiple content objects, the control unit160 may analyze the direction and speed of the drag event, and mayexecute the command determined based on the drag direction and speed.

The commands designated for the four boundaries of the touch screen 140can be changed depending on whether the selected content objects are oneor more content objects, and, accordingly, different command tips may bedisplayed. For example, the control unit 160 may instruct the displayunit 130 to display first command tips on the boundaries of the touchscreen 140 when a single content object is selected, and second commandtips when multiple content objects are selected.

When another closed loop drawing event or a touch-down event is detectedimmediately after the multiple representative images are selected andhighlighted in response to a closed loop drawing event detected on thetouch screen 140, the control unit 160 can combine at least onerepresentative image selected by the closed loop drawing event or thetouch-down event with the previously selected representative images.Accordingly, the control unit 160 may inform the user of the contentobjects selected by means of the representative images, and a user mayadd or delete the content objects to and from a group of selectedcontent objects.

As described above, according to exemplary embodiments of the presentinvention, a mobile terminal 100 may enable a mobile terminal user toinput various commands with diversified touch events on the touch screen140, thereby improving utilization of the mobile terminal and userconvenience.

A touch input method for a mobile terminal is described hereinafter indetail.

FIG. 5 is a flowchart illustrating a touch input method for a mobileterminal according to exemplary embodiments of the present invention.

Referring to FIG. 5, when a mobile terminal 100 is supplied power, themobile terminal 100 may initially display an idle mode screen (S101).The idle mode screen can be replaced, as configured by the user, with aspecific application screen (e.g. the media board application screen onwhich a plurality of representative images represent the content objectsstored in the storage unit 150). The media board application screen canalso be used as the idle mode screen of the mobile terminal 100.

While the mobile terminal 100 operates in an idle mode, the touch eventdetector 161 of the control unit 160 may monitor the touch screen 140,and determine if a touch has occurred at a location where arepresentative image is situated (S103). If no touch is detected or thetouch is detected at a location where no representative image is placed,the control unit 160 may maintain monitoring the idle mode screen or themedia board application screen.

If a touch is detected at a location where a representative image issituated, the control unit 160 may determine that the touch correspondsto a touch-down event for selecting a representative image, and maycollect information on the movement of the touch (S105). The movementinformation can include the contact point of the touch-down event and amotion value calculated using displacement and speed of the movement.For example, when a touch-down event is detected at a location where arepresentative image is situated, and then the touch moves in aparticular direction at a particular speed, the control unit 160 maydetermine that a drag event has occurred following the touch-down event,and may subsequently calculate a motion value indicating thedisplacement and speed of the movement of the touch.

The control unit 160 may determine whether the calculated motion valueof the movement is greater than a predetermined threshold value (S107).If the motion value is greater than the threshold value, the controlunit 160 may determine the occurrence of a direction-specific dragevent, and may execute a command designated for the direction-specificdrag event (S109). That is, when a representative image is selected by atouch-down event and then a drag event occurs in a predetermineddirection at a speed faster than a predetermined threshold value, themobile terminal may execute a command designated for adirection-specific drag event. For instance, if the representative imagerepresenting a picture stored in the storage unit 150 is selected by thetouch-down event and a drag event occurs in an upward direction at aspeed faster than the predetermined threshold value, the control unit160 may determine that an upward-drag event (e.g., “File name change”)has occurred, and may display a popup window allowing the user to entera new file name. Various commands can be designate for adirection-specific drag event according to the type of content and thedirection, speed, and end point of the drag. The commands designated fora direction-specific drag event can include, but are not limited to, a“delete” command, “file transmission” command, and “text messagecomposition” command.

After a representative image is selected by the touch-down event andmoved by a direction-specific drag event, the control unit 160 maydisplay, on the boundaries of the touch screen 140, command tipsindicating the available commands designated for the direction-specificdrag events. The commands may include, but are not limited to, forexample, the file name change command, delete command, multimediamessage application request command, and file transmission command. Forexample, command tips informing the user of the commands designated forthe upward drag event, downward drag event, leftward drag event, andrightward drag event may be displayed inside the four correspondingboundaries of the touch screen 140.

If the motion value is not greater than the predetermined thresholdvalue at step S107, the control unit 160 may execute a command requestedby the user. For example, if the motion value is not greater than thepredetermined threshold value, the control unit 160 may determineoccurrence of a normal drag event, and may simulate the drag of theselected representative image or activate the selected representativeimage (S111). When a representative image is selected by the touch-downevent and then a drag event occurs without lift of the contact on thetouch screen 140, the control unit 160 may determine the movement speedand motion value at the end point of the drag event, and may compare thecalculated motion value with a predetermined threshold value. If themotion value is less than the threshold value, the control unit 160 maydetermine that the drag event is a normal drag event for moving orselecting the representative image. The control unit 160 may thensimulate the drag of the selected representative image and place theselected representative image at the location where the drag motionends. The event map may map the touch events to commands associated withthe representative images displayed on the touch screen 140.

After executing the command designated for the normal drag event, thecontrol unit 160 executes a function requested by the user (S112). Theuser-requested function can be a zoom-in function for a picture and/or aplayback function for an audio file.

Next, the control unit 160 may repeat steps S101 to S113 until atermination function command is detected (S113).

FIG. 6 is a flowchart illustrating a touch input method for a mobileterminal according to exemplary embodiments of the present invention.

Referring to FIG. 6, when a mobile terminal 100 is supplied power, thecontrol unit 160 may boot up the mobile terminal 100 with the operationsystem stored in the storage unit 150, and may display a preset idlemode screen (S201). The idle mode screen can be replaced, according to aconfiguration set by the user, with a specific application screen, forexample, the media board application screen on which a plurality ofrepresentative images representing the content objects are displayed.The media board application screen can also be used as the idle modescreen of the mobile terminal 100. While the mobile terminal 100operates in idle mode, the touch screen functionality may be activated,and the control unit 160 may configure an event map according to theidle mode screen or the media board application screen. The event mapmay map the representative images and other menu objects to the touchpoints such that, when a touch is detected on a representative image ora menu object, an input signal (command) mapped to the correspondingtouch point may be executed.

While the mobile terminal operates in idle mode, the control unit 160may monitor detection of a touch on the touch screen 140 (S203). If notouch is detected, the control unit 160 may continue displaying the idlemode screen or the multimedia board application screen.

If a touch is detected, the control unit 160 may collect the data of thecontact points on a path (e.g., line) that the touch draws on the touchscreen 140 without a touch-lift event occurring (S205). That is, when atouch is detected at a point on the touch screen and the touch moves onthe touch screen 140 without a touch-lift event occurring (e.g., thecontact is not lifted), the control unit 160 may collect the contactpoints, including the initial contact point, that the touch contacts.

Next, the control unit 160 may determine whether a closed loop drawingevent (i.e., movement of the touch draws a closed loop) is detected(S207). To detect a closed loop, the control unit 160 may determinewhether a specific contact point is detected twice while tracking themovement of the touch. For instance, when the touch starts moving fromthe initial touch point and returns to the initial touch point and issubsequently lifted (i.e., the start and end points of the movement ofthe touch are identical), the control unit 160 may determine occurrenceof a closed loop drawing event. The closed loop can be formed when thestart and end points of touch movement are identical and when the touchcrosses a movement path/line of the touch on the touch screen 140.

If a closed loop drawing event is detected at step S207, the controlunit 160 may selects the representative images located inside the closedloop or may execute a command designated for the closed loop drawingevent (S209). For instance, when multiple representative images areselected by the closed loop drawing event on the touch screen 140, thecontrol unit 160 can execute a content integration command for combiningthe multiple content objects represented by the selected representativeimages in a predetermined manner, as explained above. Various commandscan be designated for the closed loop drawing event (e.g., the slidepicture album generation command, selected object deletion command,selected object-inclusive multimedia message transmission command, andselected object Bluetooth transmission command). The command designatedfor the closed loop drawing event can be changed according to the userconfiguration or the mobile terminal designer's preference/selection.Once the command designated for the closed loop drawing event isexecuted, the control unit 160 may activate an application correspondingto the command, and may display an application screen of the activatedapplication.

When multiple representative images are selected by the closed loopdrawing event, the control unit 160 can instruct the display unit 130 todisplay the command tips on the boundaries of the touch screen 140thereby informing the user of commands designated for available dragevents following the closed loop drag event. The commands designated foravailable drag events can be executed by touching the correspondingcommand tips.

The range of the selection based on the closed loop drawing event can bedetermined by the mobile terminal designer's preference/selection, oraccording to the user configuration. For example, as described above, insome cases, the control unit 160 can select only representative imagesinside of the closed loop, and, in some cases, the control unit 160 canselect the representative images situated on the boundary line of theclosed loop, as well as those placed inside of the closed loop. In somecases, the control unit 160 can select only a representative imagesituated on the boundary line of the closed loop that has a portion ofthe representative image situated inside the closed loop that is greaterthan a predetermined percentage, in addition to the representativeimages situated wholly inside of the closed loop.

When another closed loop drawing event or a touch-down event is detectedimmediately after the multiple representative images are selected andhighlighted in response to a closed loop drawing event detected on thetouch screen 140, the control unit 160 can combine the at least onerepresentative image selected by the second closed loop drawing event orthe touch-down event with the previously selected representative images.Accordingly, the control unit 160 may inform the user of the contentobjects selected by means of the representative images. The user cansubsequently add or delete the content objects to and from a group ofselected content objects.

The commands designated for the four boundaries of the touch screen 140can be changed depending on whether the selected content objects are oneor more and, as a consequence, different command tips may be displayed.For example, the control unit 160 may instruct the display unit 130 todisplay first command tips on the boundaries of the touch screen 140when a single content object is selected, and second command tips whenmultiple content objects are selected.

If a closed loop drawing event is not detected at step S207, the controlunit 160 may execute a function requested by user (S211).

As described above, a touch input device and method for a mobileterminal according to exemplary embodiments of the present invention mayenable selecting multiple content objects with a single touch event anddesignating different commands for the same touch event depending on thenumber of selected contents. Accordingly, various commands may beinputted using limited number of touch events and a user may be providedwith greater user convenience.

It will be apparent to those skilled in the art that variousmodifications and variations can be made in the present inventionwithout departing from the spirit or scope of the invention. Thus, it isintended that the present invention cover the modifications andvariations of this invention provided they come within the scope of theappended claims and their equivalents.

1. A touch input method for a mobile terminal having a touch screen, themethod comprising: displaying, on the touch screen, a plurality ofrepresentative images corresponding to content objects; selecting, fromthe plurality of representative images, at least one representativeimage in response to a first command corresponding to a first touchevent detected on the touch screen; and executing a second commandcorresponding to a second touch event detected on the touch screen, thesecond touch event being defined by a movement direction, speed, a liftposition of a touch, and the at least one representative image, thetouch being associated with the first touch event and the second touchevent.
 2. The touch input method of claim 1, further comprisingdisplaying, after selecting the at least one representative image, atleast one command tip on a first boundary of the touch screen, the atleast one command tip corresponding to second commands associated withavailable direction-specific touch events.
 3. The touch input method ofclaim 2, wherein the second touch event is one of the availabledirection-specific touch events comprising movement of the touch in adirection towards a boundary of the touch screen at a speed faster thana threshold speed value, and a second command corresponding to the atleast one of the command tip displayed on the first boundary.
 4. Thetouch input method of claim 2, wherein the at least one command tipcorresponds to at least a first set of commands or a second set ofcommands based on a number and type of the at least one representativeimage.
 5. The touch input method of claim 1, wherein selecting at leastone representative image comprises: collecting data associated withcontact points in response to a line being drawn, without lift, by thetouch on the touch screen; determining, based on the data associatedwith the contact points, whether a closed loop is drawn; and selecting,in response to the drawn closed loop, at least one of a first set of therepresentative images located inside the closed loop, a second set ofthe representative images situated on the line, and a third set of therepresentative images, wherein each representative image of the thirdset comprises a portion placed inside of the closed loop, the portioncorresponding to a first percentage being greater than a determinedpercentage.
 6. The touch input method of claim 5, wherein selecting atleast one representative image further comprises: detecting anothertouch event corresponding to drawing a second closed loop, the anothertouch event adding representative images selected using the secondclosed loop; and detecting a touch-down event for adding arepresentative image.
 7. The touch input method of claim 5, whereinexecuting a second command comprises executing, if the at least onerepresentative image comprises multiple representative images, thesecond command corresponding to the second touch event, the second touchevent resulting in selection of multiple content objects.
 8. The touchinput method of claim 7, wherein executing the second command comprisescreating a new content object by combining the content objectsrepresented by the multiple representative images.
 9. A touch inputmethod for a mobile terminal having a touch screen, the methodcomprising: collecting data associated with contact points in responseto a line being drawn, without lift, by a touch on the touch screen;determining, based on the data associated with the contact points,whether a closed loop is drawn; and selecting, in response to the drawnclosed loop, at least one of a first set of the representative imageslocated inside of the closed loop, a second set of the representativeimages situated on the line, and a third set of the representativeimages, wherein each representative image of the third set comprises aportion placed inside of the closed loop, the portion corresponding to afirst percentage being greater than a determined percentage.
 10. Thetouch input method of claim 9, further comprising displaying, afterselecting the at least one set of representative images, at least onecommand tip on a first boundary of the touch screen, the at least onecommand tip corresponding to commands associated with availabledirection-specific touch events.
 11. The touch input method of claim 10,further comprising: collecting data corresponding to a movementdirection, speed, and a final position of a second touch event detectedafter selecting the at least one set of representative images; andexecuting a command associated with the second touch event, the secondtouch event being one of the available direction-specific touch events.12. The touch input method of claim 11, wherein the second touch eventcomprises a drag event detected when a touch placed on a first image inthe at least one set of selected representative images moves toward aboundary of the touch screen at a speed faster than a threshold speedvalue.
 13. The touch input method of claim 10, wherein the command tipscorrespond to at least a first set of commands or a second set ofcommands based on a number and type of representative images in the atleast one selected set of representative images.
 14. The touch inputmethod of claim 13, further comprising: detecting another touch eventcorresponding to drawing another closed loop for further selecting atleast one representative image among unselected representative images;and detecting a touch-down event to further select a representativeimage among the unselected representative images.
 15. The touch inputmethod of claim 13, further comprising creating a new content object bycombining content objects corresponding to the selected at least one setof representative images.
 16. A touch input device for a mobileterminal, the touch input device comprising: a display unit to display aplurality of representative images, each representative imagecorresponding to a content object, the display unit comprising a touchscreen to detect touch events comprising a touch-down event to select arepresentative image and a drag event to move the selectedrepresentative image; and a control unit to execute a user commandcorresponding to a touch event detected on the touch screen, theexecution being based on a movement direction, speed, and a finalcontact point.
 17. The touch input device of claim 16, wherein thedisplay unit displays, after selection of the representative image, atleast one command tip on a first boundary of the touch screen, the atleast one command tip corresponding to commands associated withavailable direction-specific touch events.
 18. The touch input device ofclaim 17, wherein the control unit executes, when a drag event on theselected representative image moves in a direction toward a boundary ofthe touch screen at a speed faster than a threshold speed, a commandcorresponding to the at least one command tip displayed on the firstboundary of the touch screen.
 19. The touch input device of claim 16,wherein the control unit is configured to collect data associated withcontact points in response to a line being drawn, without lift, by atouch on the touch screen, to determine whether a closed loop is drawnbased on the data associated with the contact points, and to select, inresponse to the drawn closed loop, at least one of a first set of therepresentative images located inside the closed loop, a second set ofthe representative images situated on the line, and a third set of therepresentative images, wherein each representative image of the thirdset comprises a portion placed inside of the closed loop, the portioncorresponding to a first percentage being greater than a determinedpercentage.
 20. The touch input device of claim 19, wherein the controlunit detects another touch event corresponding to drawing another closedloop, and a touch-down event to further select at least onerepresentative image among unselected representative images.